Dr. Scott Texter talked about the challenges involved in cryogenic testing of the James Webb Space Telescope (JWST) mirror segments. Texter is the JWST Telescope Manager at Northrop Grumman and is responsible for all aspects of the design, fabrication, and testing of the telescope element of the overall observatory. Here is the first in an series of audio podcasts about technology developments and accomplishments at Northrop Grumman Aerospace Systems sector.